-- Core must test WITHOUT OVERLAPS
-- with an int4range + daterange,
-- so here we do some simple tests
-- to make sure int + daterange works too,
-- since that is the expected use-case.
CREATE TABLE temporal_rng (
  id integer,
  valid_at daterange,
  CONSTRAINT temporal_rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
\d temporal_rng
              Table "public.temporal_rng"
  Column  |   Type    | Collation | Nullable | Default 
----------+-----------+-----------+----------+---------
 id       | integer   |           | not null | 
 valid_at | daterange |           | not null | 
Indexes:
    "temporal_rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_rng_pk';
            pg_get_constraintdef             
---------------------------------------------
 PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
(1 row)

SELECT pg_get_indexdef(conindid, 0, true) FROM pg_constraint WHERE conname = 'temporal_rng_pk';
                                pg_get_indexdef                                
-------------------------------------------------------------------------------
 CREATE UNIQUE INDEX temporal_rng_pk ON temporal_rng USING gist (id, valid_at)
(1 row)

INSERT INTO temporal_rng VALUES
  (1, '[2000-01-01,2001-01-01)');
-- same key, doesn't overlap:
INSERT INTO temporal_rng VALUES
  (1, '[2001-01-01,2002-01-01)');
-- overlaps but different key:
INSERT INTO temporal_rng VALUES
  (2, '[2000-01-01,2001-01-01)');
-- should fail:
INSERT INTO temporal_rng VALUES
  (1, '[2000-06-01,2001-01-01)');
ERROR:  conflicting key value violates exclusion constraint "temporal_rng_pk"
DETAIL:  Key (id, valid_at)=(1, [06-01-2000,01-01-2001)) conflicts with existing key (id, valid_at)=(1, [01-01-2000,01-01-2001)).
-- Foreign key
CREATE TABLE temporal_fk_rng2rng (
  id integer,
  valid_at daterange,
  parent_id integer,
  CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
  CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
    REFERENCES temporal_rng (id, PERIOD valid_at)
);
\d temporal_fk_rng2rng
           Table "public.temporal_fk_rng2rng"
  Column   |   Type    | Collation | Nullable | Default 
-----------+-----------+-----------+----------+---------
 id        | integer   |           | not null | 
 valid_at  | daterange |           | not null | 
 parent_id | integer   |           |          | 
Indexes:
    "temporal_fk_rng2rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
Foreign-key constraints:
    "temporal_fk_rng2rng_fk" FOREIGN KEY (parent_id, PERIOD valid_at) REFERENCES temporal_rng(id, PERIOD valid_at)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_fk_rng2rng_fk';
                                 pg_get_constraintdef                                  
---------------------------------------------------------------------------------------
 FOREIGN KEY (parent_id, PERIOD valid_at) REFERENCES temporal_rng(id, PERIOD valid_at)
(1 row)

-- okay
INSERT INTO temporal_fk_rng2rng VALUES
  (1, '[2000-01-01,2001-01-01)', 1);
-- okay spanning two parent records:
INSERT INTO temporal_fk_rng2rng VALUES
  (2, '[2000-01-01,2002-01-01)', 1);
-- key is missing
INSERT INTO temporal_fk_rng2rng VALUES
  (3, '[2000-01-01,2001-01-01)', 3);
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=(3, [01-01-2000,01-01-2001)) is not present in table "temporal_rng".
-- key exist but is outside range
INSERT INTO temporal_fk_rng2rng VALUES
  (4, '[2001-01-01,2002-01-01)', 2);
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=(2, [01-01-2001,01-01-2002)) is not present in table "temporal_rng".
-- key exist but is partly outside range
INSERT INTO temporal_fk_rng2rng VALUES
  (5, '[2000-01-01,2002-01-01)', 2);
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=(2, [01-01-2000,01-01-2002)) is not present in table "temporal_rng".